A scandalous white girl who sleeps around with black men. Just as bugs are taken out of a pool due to hygenic issues; The scandalous white girls are taken out of the dating pool for white guys.

<friend #1> Hey, why did you want to leave the bar so soon? I was just about to get with that chick.
<friend #2> Because that girl's a bug. I heard she was sleeping with so and so's cousin, Tyrone.
<friend #1> Oh man, thanks. That was close.